Reconstruction of the
2018 Buckland Down formation |
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1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines.
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2. |
| Construct the inscribed square of circle 1, pointing up.
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3. |
| Draw the 45°, 135°, 225°, and 315° rays (with respect to the righthand half of the horizontal centerline) of circle 1, as shown.
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4. |
| Construct the inscribed square of square 2, with the angular points on rays 3.
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5. |
| Construct the inscribed square of square 4, pointing up.
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6. |
| Construct the inscribed square of square 5, with the angular points on rays 3.
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7. |
| Construct the inscribed square of square 6, pointing up.
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8. |
| Construct the inscribed circle of square 7.
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9. |
| Copy circle 8 four times, to the angular points of square 2.
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10. |
| Construct a circle centered at the righthand angular point of square 5, tangent to circle 8 at the righthand side.
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11. |
| Copy circle 10 four times, to the centers of circles 9.
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12. |
| Copy circle 10 to the intersection of circle 1 and the upper righthand ray 3.
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13. |
| Construct a circle centered at the lefthand intersection of the righthand circle 9 and the horizontal centerline, tangent to circle 12 at the lower side.
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14. |
| Copy circle 13 three times, to the corresponding intersections of the other circles 9 and the horizontal and vertical centerlines.
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15. |
| Construct a circle concentric to circle 1, tangent to circle 12 at the lower lefthand side.
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16. |
| Construct a circle centered at the righthand intersection of circle 13 and the horizontal centerline, tangent to the righthand circle 11 at the righthand side.
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17. |
| Copy circle 16 four times, to the intersections of circle 15 and rays 3.
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18. |
| Construct the "two-points" circle (defined by the two end-points of a centerline) between the center of the upper righthand circle 17 and the upper righthand angular point of square 4. See detail.
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19. |
| Copy circle 18 four times, to the angular points of square 4. See detail.
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20. |
| Construct two pairs of parallel lines, parallel to rays 3, tangent to circles 19 at both sides. See detail.
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21. |
| Copy circle 18 four times, to the intersections of circle 1 and the horizontal and vertical centerlines.
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22. |
| Construct two pairs of parallel lines, parallel to the horizontal and vertical centerlines, tangent to circles 21 at both sides. See detail.
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23. |
| Circles 8, 9, 11, 13, 14, and 17, and lines 20, and 22, are used for the final reconstruction.
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24. |
| Remove all parts not visible within the formation itself.
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25. |
| Colour all areas corresponding to standing...
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26. |
| ...or to flattened crop, and finish the reconstruction of the 2018 Buckland Down formation.
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27. |
| The final result, matched with the aerial image.
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